Fluid Mosaic Model of plasma membrane was proposed by

Correct option is B

The correct answer is (b)  Singer and Nicolson
Explanation: • The  Fluid Mosaic Model was proposed by  S.J. Singer and Garth L. Nicolson in  1972. • It is the most widely accepted model that explains the  structure and function of the plasma membrane. • According to this model, the membrane is a  "mosaic" of components—primarily  phospholipids, proteins, and carbohydrates—that gives it a fluid character. • The  lipid bilayer provides the fluid matrix, while various  proteins are embedded or attached to it, resembling a mosaic pattern. • The  "fluid" nature allows for the lateral movement of proteins and lipids within the membrane, which is essential for processes like  cell growth,  secretion, and  cell division.
Information Booster: • According to  NCERT Biology (Class 11), the "quasi-fluid" nature of lipids enables the  lateral movement of proteins within the overall bilayer. • This ability to move within the membrane is measured as its  fluidity, which is vital for the membrane's ability to remain functional under different temperatures.
Additional Knowledge: Watson and Crick (Option a) • They are famous for proposing the  double-helix model of DNA in 1953, not the structure of the cell membrane.
Hooke (Option c) •  Robert Hooke was the first scientist to discover and name the  "cell" in 1665 while observing a thin slice of cork under a primitive microscope.
Robertson (Option d) •  J. David Robertson proposed the  Unit Membrane Model in the 1950s, which suggested a uniform trilaminar (three-layered) structure for all biological membranes, a theory later refined by the Fluid Mosaic Model.